Radio 5 Live with DH
It is much more likely that the first CC caller to the Duncan Holley show was a BASSA plant as she was trotting out the same old rubbish and agreeing with everything DH was saying.
As Tiramasu said, the other CC who called in near the end was indeed articulate and stayed calm despite DH accusation of being a management stooge. The mask suddenly dropped and he became very defensive the second he was challenged.